The rate of global sea level rise and its causes has been debated for a century. Despite 100 years of scientific scrutiny, no definitive conclusion has been reached. Join Dr. Walter Munk as he describes why 20th century sea level rise remains an enigma, and why scientists still grapple with whether seawater warming or continental ice melting had the greatest influence. Series: "Perspectives on Ocean Science" [5/2004] [Science] [Show ID: 8335]